2025 HYUNDAI IONIQ 5 Complaints

My Ioniq5 experienced a failure of the Integrated Charging Control Unit (ICCU) while driving. There was a loud "pop" noise from the back seat that occurred while driving, and afterwards the car experienced an unexpected braking/deceleration and was unable to maintain a speed over ~30MPH. After the "pop" noise -- a "Check electric vehicle system" alert appeared on the dash, and an alert that the car had entered a limited power state also appeared a few minutes later. My safety was put at risk due to the car unexpectedly decelerating and then losing the ability to maintain speed while driving on a busy highway. Other's safety was put at risk due to my limited ability to maintain speed and not impede traffic. There was no warning's prior to the sudden failure to indicate there was anything wrong with the vehicle. The car needed to be towed to the dealer due to the limited state the car was put in. It was confirmed at the dealership that the ICCU had failed and needed to be replaced. It was also confirmed at the dealership that the replacement part was the same as what had failed, which is concerning for mine and other safety that this is at risk of occurring again.

While driving, loud pop sound came from rear of car. No prior warning or lights before this. Car immediately displayed a check electrical vehicle system warning light. Luckily we were somewhere were we could pull over immediately. Towed to dealer and they determined it was the ICCU that popped. Due to the ICCU failure, we could have completely lost car power if we didn't have somewhere to stop. Currently car is sitting at dealer with no ETA for getting fixed. Part is not available .

The Integrated Charging Control Unit (ICCU) failed on [XXX]. An electrical system warning light appeared on the dashboard as soon as I turned on the vehicle; a review of the diagnostic code via the Hyundai Bluelink app indicated that the vehicle was unsafe to drive. It was towed to Napleton's Hyundai service center in Urbana, Illinois. I was informed that the replacement parts were on a nationwide backorder. The repairs were finally completed on February 25, 2026. The repairs were covered under warranty; however, it was a disappointment and inconvenience for a practically new car to suffer a critical part failure and then to be out of commission for 50 days. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

ICCU failure at 5308 miles. heard a loud pop while driving and 12v warning system errors

I was driving on a 4 lane major artery on 12 / 30/2025 traveling approximately 50 mph. Heard a loud bang and car loss power and suddenly slowed. Vehicles behind me had to swerve to miss hitting me. The vehicle could move approximately 5 mph afterward. We pulled off the road onto a side road. We later found out the ICCU failed from the Hyundai dealership. It has been there since that date awaiting parts to repair

Integrated Charging Control Unit (ICCU) failed while driving. Heard a pop from below the rear seats. "Check vehicle electrical system" message popped up initially, then changed to "Stop vehicle and check power supply" Vehicle could not exceed 20mph directly after failure, then lost all driving power just as I pulled the vehicle off the road. If I hadn't found a place to pull over in time, the car would have stopped in the middle of the road putting my safety and the safety of others at risk. Dealer inspected and took over a month to replace ICCU and 12v battery.

ICCU unit failed on 1/27/26, vehicle entered limp mode and is unusable. This is affecting thousands of Hyundai Ioniq 5 autos, and probably others as well. Due to the widespread problem, Hyundai is unable to give an estimate on finding a replacement part.

While driving, heard a POP sound, followed but multiple warnings to stop vehicle and check the electrical system. The car went into turtle mode. luckily I was close to home, but any other situation could have been dangerous. This is a commonly known issue with these Ioniq 5 vehicles. The ICCU fails and can no longer charge the 12v battery, causing loss of electrical systems and possibly even the ability to have hazards on if you are stuck in traffic.

The vehicle was in the middle of a u-turn when the ICCU fuse suddenly and without warning blew. Display warning messages came on to "check electrical system". Car was able to drive in "limp mode" at about 40 mph on level roads, but not more than 25 mph on any uphill. This is a well known problem with Hyundai EVs. It will be towed to a dealer to confirm. It felt extremely unsafe to be in the middle of a turn on a public street and have the car power system fail. Luckily there was minimal traffic at the moment. A few minutes earlier or later would have been on a heavily trafficked road

ICCU failure. Vehicle has 5200 miles on it. A loud "pop" was heard then the vehicle went into "limp mode" and restricted speed to 30 mph. After about 10 miles the car totally lost power and wouldn't start. Warning l messages said to get it serviced which is what I was attempting to do.